/* ─── Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d0d10;
  --bg-2: #111115;
  --bg-3: #16161a;
  --text: #eee9e3;
  --text-muted: #7a7a8a;
  --accent: #f5a623;
  --accent-2: #6b8afd;
  --border: #222230;
  --code-bg: #0a0a0d;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── Typography ──────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

/* ─── Navigation ──────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(13,13,16,0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}
.nav-links { display: flex; gap: 2rem; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }

/* ─── Hero ────────────────────────────────────────────── */
.hero {
  padding: 6rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid rgba(245,166,35,0.3);
  border-radius: 4px;
}
.hero-headline {
  font-size: clamp(2.8rem, 5vw, 4rem);
  color: var(--text);
  margin-bottom: 1.5rem;
  font-weight: 800;
}
.hero-headline .accent { color: var(--accent); }
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
  max-width: 520px;
}
.hero-solution {
  font-size: 1rem;
  color: var(--text);
  font-weight: 500;
  max-width: 520px;
}

/* ─── Memory Diagram ──────────────────────────────────── */
.memory-diagram {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  font-size: 0.8rem;
}
.mem-title {
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.mem-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.shared-row {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border);
}
.mem-agent {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 90px;
  color: var(--text-muted);
  font-size: 0.78rem;
}
.agent-icon {
  width: 28px;
  height: 28px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.65rem;
  color: var(--text);
}
.shared-icon { border-color: var(--accent); color: var(--accent); }
.shared-agent { color: var(--accent); }
.mem-connector { flex: 1; height: 1px; background: var(--border); }
.shared-connector { background: rgba(245,166,35,0.3); }
.mem-block {
  flex: 1;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  min-width: 0;
}
.mem-block.shared { border-color: rgba(245,166,35,0.25); background: rgba(245,166,35,0.03); }
.mem-block-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.mem-facts { display: flex; flex-direction: column; gap: 0.3rem; }
.fact {
  font-size: 0.72rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-2);
  border-left: 2px solid var(--accent);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fact-active { color: var(--text); border-color: var(--accent); }
.fact-faded { opacity: 0.4; }
.fact-shared { border-color: var(--accent-2); }

/* ─── Problem ──────────────────────────────────────────── */
.problem {
  border-top: 1px solid var(--border);
  padding: 5rem 2rem;
}
.problem-inner {
  max-width: 1200px;
  margin: 0 auto 3rem;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  align-items: start;
}
.problem-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.4rem;
}
.problem-headline {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--text);
}
.problem-statement p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}
.problem-scroll {
  max-width: 1200px;
  margin: 0 auto;
}
.problem-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.problem-card {
  background: var(--bg-2);
  padding: 2rem;
}
.p-icon { color: var(--text-muted); margin-bottom: 1rem; }
.problem-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.problem-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.65; }

/* ─── Features ────────────────────────────────────────── */
.features {
  border-top: 1px solid var(--border);
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.features-header {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 3rem;
}
.features-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.4rem;
}
.features-title { font-size: 2rem; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.feature-card {
  background: var(--bg-2);
  padding: 1.75rem;
  transition: background 0.2s;
}
.feature-card:hover { background: var(--bg-3); }
.feature-card.large { grid-column: span 2; }
.feature-icon { margin-bottom: 1.25rem; }
.feature-card h3 {
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.feature-card p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 1rem; }
.feature-detail code {
  display: block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  font-size: 0.75rem;
  color: var(--accent);
  font-family: 'IBM Plex Mono', monospace;
  line-height: 1.5;
  overflow-x: auto;
}

/* ─── How It Works ────────────────────────────────────── */
.how-it-works {
  border-top: 1px solid var(--border);
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.how-header {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 3rem;
}
.how-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.4rem;
}
.how-title { font-size: 2rem; }
.how-flow {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  margin-bottom: 4rem;
}
.flow-step { flex: 1; }
.flow-num {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.flow-step h3 { font-size: 1rem; margin-bottom: 0.75rem; color: var(--text); }
.flow-step p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 1rem; }
.flow-code code {
  display: block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  font-size: 0.72rem;
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  line-height: 1.6;
  overflow-x: auto;
}
.flow-connector {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 2rem;
  flex-shrink: 0;
}
.how-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.meta-item {
  background: var(--bg-2);
  padding: 1.5rem 1.75rem;
  text-align: center;
}
.meta-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.meta-value {
  font-family: 'Syne', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.meta-desc { font-size: 0.75rem; color: var(--text-muted); }

/* ─── Closing ──────────────────────────────────────────── */
.closing {
  border-top: 1px solid var(--border);
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.closing-inner { max-width: 720px; }
.closing-headline {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--text);
  margin-bottom: 2rem;
  line-height: 1.2;
}
.closing-headline .accent { color: var(--accent); }
.closing-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

/* ─── Footer ──────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Syne', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text); }
.footer-copy { font-size: 0.8rem; color: #444; }

/* ─── Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; }
  .problem-inner { grid-template-columns: 1fr; }
  .problem-number { display: none; }
  .problem-cards { grid-template-columns: 1fr; }
  .features-header { grid-template-columns: 1fr; }
  .features-number { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card.large { grid-column: span 1; }
  .how-flow { flex-direction: column; }
  .flow-connector { display: none; }
  .how-meta { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { flex-wrap: wrap; gap: 1rem; }
  .footer-copy { width: 100%; }
  .nav-links { display: none; }
}

@media (max-width: 480px) {
  .hero { padding: 4rem 1.25rem 3rem; }
  .hero-headline { font-size: 2.2rem; }
  .how-meta { grid-template-columns: 1fr 1fr; }
}